/uspace/trunk/softfloat/include/arithmetic.h |
---|
0,0 → 1,36 |
/* |
* Copyright (C) 2005 Josef Cejka |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* are met: |
* |
* - Redistributions of source code must retain the above copyright |
* notice, this list of conditions and the following disclaimer. |
* - Redistributions in binary form must reproduce the above copyright |
* notice, this list of conditions and the following disclaimer in the |
* documentation and/or other materials provided with the distribution. |
* - The name of the author may not be used to endorse or promote products |
* derived from this software without specific prior written permission. |
* |
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
*/ |
#ifndef __ARITHMETIC_H__ |
#define __ARITHMETIC_H__ |
float32 addFloat32(float32 a, float32 b); |
float32 subFloat32(float32 a, float32 b); |
#endif |
/uspace/trunk/softfloat/include/comparison.h |
---|
0,0 → 1,36 |
/* |
* Copyright (C) 2005 Josef Cejka |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* are met: |
* |
* - Redistributions of source code must retain the above copyright |
* notice, this list of conditions and the following disclaimer. |
* - Redistributions in binary form must reproduce the above copyright |
* notice, this list of conditions and the following disclaimer in the |
* documentation and/or other materials provided with the distribution. |
* - The name of the author may not be used to endorse or promote products |
* derived from this software without specific prior written permission. |
* |
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
*/ |
#ifndef __COMPARISON_H__ |
#define __COMPARISON_H__ |
inline int isFloat32NaN(float32 f); |
inline int isFloat32SigNaN(float32 f); |
#endif |
/uspace/trunk/softfloat/include/sftypes.h |
---|
0,0 → 1,78 |
/* |
* Copyright (C) 2005 Josef Cejka |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* are met: |
* |
* - Redistributions of source code must retain the above copyright |
* notice, this list of conditions and the following disclaimer. |
* - Redistributions in binary form must reproduce the above copyright |
* notice, this list of conditions and the following disclaimer in the |
* documentation and/or other materials provided with the distribution. |
* - The name of the author may not be used to endorse or promote products |
* derived from this software without specific prior written permission. |
* |
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
*/ |
#ifndef __SFTYPES_H__ |
#define __SFTYPES_H__ |
typedef union { |
float f; |
struct { |
#ifdef __BIG_ENDIAN__ |
__u32 sign:1; |
__u32 exp:8; |
__u32 mantisa:23; |
#elif defined __LITTLE_ENDIAN__ |
__u32 mantisa:23; |
__u32 exp:8; |
__u32 sign:1; |
#else |
#error "Unknown endians." |
#endif |
} parts __attribute__ ((packed)); |
} float32; |
typedef union { |
double d; |
struct { |
#ifdef __BIG_ENDIAN__ |
__u64 sign:1; |
__u64 exp:11; |
__u64 mantisa:52; |
#elif defined __LITTLE_ENDIAN__ |
__u64 mantisa:52; |
__u64 exp:11; |
__u64 sign:1; |
#else |
#error "Unknown endians." |
#endif |
} parts __attribute__ ((packed)); |
} float64; |
#define FLOAT32_MAX 0x7f800000 |
#define FLOAT32_MIN 0xff800000 |
#define FLOAT64_MAX |
#define FLOAT64_MIN |
#define FLOAT32_BIAS 0xF7 |
#define FLOAT64_BIAS 0x3FF |
#define FLOAT80_BIAS 0x3FFF |
#endif |
/uspace/trunk/softfloat/include/softfloat.h |
---|
29,52 → 29,6 |
#ifndef __SOFTFLOAT_H__ |
#define __SOFTFLOAT_H__ |
typedef union { |
float f; |
struct { |
#ifdef __BIG_ENDIAN__ |
__u32 sign:1; |
__u32 exp:8; |
__u32 mantisa:23; |
#elif defined __LITTLE_ENDIAN__ |
__u32 mantisa:23; |
__u32 exp:8; |
__u32 sign:1; |
#else |
#error "Unknown endians." |
#endif |
} parts __attribute__ ((packed)); |
} float32; |
typedef union { |
double d; |
struct { |
#ifdef __BIG_ENDIAN__ |
__u64 sign:1; |
__u64 exp:11; |
__u64 mantisa:52; |
#elif defined __LITTLE_ENDIAN__ |
__u64 mantisa:52; |
__u64 exp:11; |
__u64 sign:1; |
#else |
#error "Unknown endians." |
#endif |
} parts __attribute__ ((packed)); |
} float64; |
#define FLOAT32_MAX 0x7f800000 |
#define FLOAT32_MIN 0xff800000 |
#define FLOAT64_MAX |
#define FLOAT64_MIN |
#define FLOAT32_BIAS 0xF7 |
#define FLOAT64_BIAS 0x3FF |
#define FLOAT80_BIAS 0x3FFF |
float __addsf3(float a, float b); |
double __adddf3(double a, double b); |
long double __addtf3(long double a, long double b); |
/uspace/trunk/softfloat/include/other.h |
---|
0,0 → 1,33 |
/* |
* Copyright (C) 2005 Josef Cejka |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* are met: |
* |
* - Redistributions of source code must retain the above copyright |
* notice, this list of conditions and the following disclaimer. |
* - Redistributions in binary form must reproduce the above copyright |
* notice, this list of conditions and the following disclaimer in the |
* documentation and/or other materials provided with the distribution. |
* - The name of the author may not be used to endorse or promote products |
* derived from this software without specific prior written permission. |
* |
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
*/ |
#ifndef __OTHER_H__ |
#define __OTHER_H__ |
#endif |
/uspace/trunk/softfloat/include/conversion.h |
---|
0,0 → 1,33 |
/* |
* Copyright (C) 2005 Josef Cejka |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* are met: |
* |
* - Redistributions of source code must retain the above copyright |
* notice, this list of conditions and the following disclaimer. |
* - Redistributions in binary form must reproduce the above copyright |
* notice, this list of conditions and the following disclaimer in the |
* documentation and/or other materials provided with the distribution. |
* - The name of the author may not be used to endorse or promote products |
* derived from this software without specific prior written permission. |
* |
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
*/ |
#ifndef __CONVERSION_H__ |
#define __CONVERSION_H__ |
#endif |
/uspace/trunk/softfloat/generic/softfloat.c |
---|
1,4 → 1,3 |
/* |
* Copyright (C) 2005 Josef Cejka |
* All rights reserved. |
28,11 → 27,13 |
*/ |
#include<softfloat.h> |
#include<sftypes.h> |
#include<arithmetic.h> |
#include<conversion.h> |
#include<comparison.h> |
#include<other.h> |
float32 addFloat32(float32 a, float32 b); |
float32 subFloat32(float32 a, float32 b); |
inline int isFloat32NaN(float32 f); |
inline int isFloat32SigNaN(float32 f); |
/* Arithmetic functions */ |
float __addsf3(float a, float b) |
{ |
39,7 → 40,14 |
float32 fa, fb; |
fa.f=a; |
fb.f=b; |
if (fa.parts.sign!=fb.parts.sign) return subFloat32(fa,fb).f; |
if (fa.parts.sign!=fb.parts.sign) { |
if (fa.parts.sign) { |
fa.parts.sign=0; |
return subFloat32(fb,fa).f; |
}; |
fb.parts.sign=0; |
return subFloat32(fa,fb).f; |
} |
return addFloat32(fa,fb).f; |
}; |
48,7 → 56,10 |
float32 fa, fb; |
fa.f=a; |
fb.f=b; |
if (fa.parts.sign!=fb.parts.sign) return addFloat32(fa,fb).f; |
if (fa.parts.sign!=fb.parts.sign) { |
fb.parts.sign!=fb.parts.sign; |
return addFloat32(fa,fb).f; |
} |
return subFloat32(fa,fb).f; |
}; |
68,107 → 79,9 |
return fa.d; |
}; |
/** Add two Float32 numbers with same signs |
*/ |
float32 addFloat32(float32 a, float32 b) |
{ |
int expdiff; |
__u32 exp1,exp2,mant1,mant2; |
/* Conversion functions */ |
expdiff=a.parts.exp - b.parts.exp; |
if (expdiff<0) { |
if (isFloat32NaN(b)) { |
//TODO: fix SigNaN |
if (isFloat32SigNaN(b)) { |
}; |
return b; |
}; |
/* Comparison functions */ |
if (b.parts.exp==0xFF) { |
return b; |
} |
/* Other functions */ |
mant1=b.parts.mantisa; |
exp1=b.parts.exp; |
mant2=a.parts.mantisa; |
exp2=a.parts.exp; |
expdiff*=-1; |
} else { |
if (isFloat32NaN(a)) { |
//TODO: fix SigNaN |
if ((isFloat32SigNaN(a))||(isFloat32SigNaN(b))) { |
}; |
return a; |
}; |
if (a.parts.exp==0xFF) { |
return a; |
} |
mant1=a.parts.mantisa; |
exp1=a.parts.exp; |
mant2=b.parts.mantisa; |
exp2=b.parts.exp; |
}; |
if (exp1==0) { |
//both are denormalized |
mant1+=mant2; |
if (mant1&0xF00000) { |
a.parts.exp=1; |
}; |
a.parts.mantisa=mant1; |
return a; |
}; |
// create some space for rounding |
mant1<<=6; |
mant2<<=6; |
mant1|=0x20000000; //add hidden bit |
if (exp2==0) { |
--expdiff; |
} else { |
mant2|=0x20000000; //hidden bit |
}; |
if (expdiff>24) { |
goto done; |
}; |
mant2>>=expdiff; |
mant1+=mant2; |
done: |
if (mant1&0x40000000) { |
++exp1; |
mant1>>=1; |
}; |
//rounding - if first bit after mantisa is set then round up |
mant1+=0x20; |
a.parts.exp=exp1; |
a.parts.mantisa=mant1>>6; |
return a; |
}; |
/** Substract two float32 numbers with same signs |
*/ |
float32 subFloat32(float32 a, float32 b) |
{ |
}; |
inline int isFloat32NaN(float32 f) |
{ /* NaN : exp = 0xff and nonzero mantisa */ |
return ((f.parts.exp==0xFF)&&(f.parts.mantisa)); |
}; |
inline int isFloat32SigNaN(float32 f) |
{ /* SigNaN : exp = 0xff mantisa = 1xxxxx..x (binary), where at least one x is nonzero */ |
return ((f.parts.exp==0xFF)&&(f.parts.mantisa>0x400000)); |
}; |
/uspace/trunk/softfloat/generic/other.c |
---|
0,0 → 1,29 |
/* |
* Copyright (C) 2005 Josef Cejka |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* are met: |
* |
* - Redistributions of source code must retain the above copyright |
* notice, this list of conditions and the following disclaimer. |
* - Redistributions in binary form must reproduce the above copyright |
* notice, this list of conditions and the following disclaimer in the |
* documentation and/or other materials provided with the distribution. |
* - The name of the author may not be used to endorse or promote products |
* derived from this software without specific prior written permission. |
* |
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
*/ |
/uspace/trunk/softfloat/generic/conversion.c |
---|
0,0 → 1,28 |
/* |
* Copyright (C) 2005 Josef Cejka |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* are met: |
* |
* - Redistributions of source code must retain the above copyright |
* notice, this list of conditions and the following disclaimer. |
* - Redistributions in binary form must reproduce the above copyright |
* notice, this list of conditions and the following disclaimer in the |
* documentation and/or other materials provided with the distribution. |
* - The name of the author may not be used to endorse or promote products |
* derived from this software without specific prior written permission. |
* |
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
*/ |
/uspace/trunk/softfloat/generic/arithmetic.c |
---|
0,0 → 1,125 |
/* |
* Copyright (C) 2005 Josef Cejka |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* are met: |
* |
* - Redistributions of source code must retain the above copyright |
* notice, this list of conditions and the following disclaimer. |
* - Redistributions in binary form must reproduce the above copyright |
* notice, this list of conditions and the following disclaimer in the |
* documentation and/or other materials provided with the distribution. |
* - The name of the author may not be used to endorse or promote products |
* derived from this software without specific prior written permission. |
* |
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
*/ |
#include<sftypes.h> |
#include<arithmetic.h> |
/** Add two Float32 numbers with same signs |
*/ |
float32 addFloat32(float32 a, float32 b) |
{ |
int expdiff; |
__u32 exp1,exp2,mant1,mant2; |
expdiff=a.parts.exp - b.parts.exp; |
if (expdiff<0) { |
if (isFloat32NaN(b)) { |
//TODO: fix SigNaN |
if (isFloat32SigNaN(b)) { |
}; |
return b; |
}; |
if (b.parts.exp==0xFF) { |
return b; |
} |
mant1=b.parts.mantisa; |
exp1=b.parts.exp; |
mant2=a.parts.mantisa; |
exp2=a.parts.exp; |
expdiff*=-1; |
} else { |
if (isFloat32NaN(a)) { |
//TODO: fix SigNaN |
if ((isFloat32SigNaN(a))||(isFloat32SigNaN(b))) { |
}; |
return a; |
}; |
if (a.parts.exp==0xFF) { |
return a; |
} |
mant1=a.parts.mantisa; |
exp1=a.parts.exp; |
mant2=b.parts.mantisa; |
exp2=b.parts.exp; |
}; |
if (exp1==0) { |
//both are denormalized |
mant1+=mant2; |
if (mant1&0xF00000) { |
a.parts.exp=1; |
}; |
a.parts.mantisa=mant1; |
return a; |
}; |
// create some space for rounding |
mant1<<=6; |
mant2<<=6; |
mant1|=0x20000000; //add hidden bit |
if (exp2==0) { |
--expdiff; |
} else { |
mant2|=0x20000000; //hidden bit |
}; |
if (expdiff>24) { |
goto done; |
}; |
mant2>>=expdiff; |
mant1+=mant2; |
done: |
if (mant1&0x40000000) { |
++exp1; |
mant1>>=1; |
}; |
//rounding - if first bit after mantisa is set then round up |
mant1+=0x20; |
a.parts.exp=exp1; |
a.parts.mantisa=mant1>>6; |
return a; |
}; |
/** Substract two float32 numbers with same signs |
*/ |
float32 subFloat32(float32 a, float32 b) |
{ |
}; |
/uspace/trunk/softfloat/generic/comparison.c |
---|
0,0 → 1,41 |
/* |
* Copyright (C) 2005 Josef Cejka |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* are met: |
* |
* - Redistributions of source code must retain the above copyright |
* notice, this list of conditions and the following disclaimer. |
* - Redistributions in binary form must reproduce the above copyright |
* notice, this list of conditions and the following disclaimer in the |
* documentation and/or other materials provided with the distribution. |
* - The name of the author may not be used to endorse or promote products |
* derived from this software without specific prior written permission. |
* |
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
*/ |
#include<sftypes.h> |
#include<comparison.h> |
inline int isFloat32NaN(float32 f) |
{ /* NaN : exp = 0xff and nonzero mantisa */ |
return ((f.parts.exp==0xFF)&&(f.parts.mantisa)); |
}; |
inline int isFloat32SigNaN(float32 f) |
{ /* SigNaN : exp = 0xff mantisa = 1xxxxx..x (binary), where at least one x is nonzero */ |
return ((f.parts.exp==0xFF)&&(f.parts.mantisa>0x400000)); |
}; |